More class based handlers

tests/test_dispatcher/test_handler/test_pre_checkout_query.py

@@ -0,0 +1,25 @@
+from typing import Any
+
+import pytest
+from aiogram.api.types import PreCheckoutQuery, User
+from aiogram.dispatcher.handler import PreCheckoutQueryHandler
+
+
+class TestPreCheckoutQueryHandler:
+    @pytest.mark.asyncio
+    async def test_attributes_aliases(self):
+        event = PreCheckoutQuery(
+            id="query",
+            from_user=User(id=42, is_bot=False, first_name="Test"),
+            currency="BTC",
+            total_amount=7,
+            invoice_payload="payload",
+        )
+
+        class MyHandler(PreCheckoutQueryHandler):
+            async def handle(self) -> Any:
+                assert self.event == event
+                assert self.from_user == self.event.from_user
+                return True
+
+        assert await MyHandler(event)